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Help! Dead Ultegra DI2

Old 08-13-13, 07:41 PM
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Help! Dead Ultegra DI2

My Ultegra Di2 just died and I can't figure out what's wrong. It doesn't shift either the FD or the RD. I charged the battery last week and I've only gone 40 miles since the charge.

Besides not shifting, the green light doesn't light up when I depress one of the shifters for more than three second (which would normally indicate a dead battery). Surprisingly, the red light does light up when I depress the adjuster button.

Here's what I've tried so far:
Removed and inserted the battery
Removed and re-inserted all of the wire plugs

Unfortunately, I'm on a riding vacation and the LBS here has no experience with DI2.

Any ideas would be greatly appreciated.


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Old 08-13-13, 07:45 PM
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Not familiar enough to suggest anything. But first thing tomorrow AM, try calling either the dealer you bought from, or Shimano USA, and see if someone can walk you through a diagnostic.
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Old 08-13-13, 08:29 PM
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best thing to do is hook it up to the shimano diagnostic tool. if will run through the diagnostic process step by step. besides what you have done i have no other tips for fixing it on the road
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Old 08-13-13, 08:39 PM
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You can check the amount of battery charge remaining by pressing and holding either shifting switch for 0.5 seconds or more. What happens? You should get a solid or flashing green or a solid or flashing red on the battery indicator on the A Junction.

If nothing happens at all you're not connected and probably have a break in the wiring.

Last edited by Burton; 08-13-13 at 08:42 PM.
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